M312 Excavator Machine System Caterpillar

Boom - One Piece

Usage:

M312 6TL

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Illustration 1	g03398176

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Table 1
Specification for 123-8929 Boom
Item	Qty	Part	Specification Description
All bores must be free of paint. Coat all bores for the pins with lubricant including stick, the upper frame, and the cylinder pin bores.
1	1	7X-2552 Bolt	Torque to 300 ± 40 N·m (221 ± 30 lb ft).
2	6	8T-4956 Bolt	Torque to 100 ± 20 N·m (74 ± 15 lb ft).
3	2	133-2424 Shim	As required, use the shim of thickness 0.5 mm (0.02 inch) to adjust maximum lateral clearance of 1.0 mm (0.04 inch).
4	1	8T-4780 Bolt	Torque to 325 ± 40 N·m (240 ± 30 lb ft).
5	1	172-5855 Pin As	Diameter is 69.950 ± 0.025 mm (2.7539 ± 0.0010 inch).
6	1	172-5863 Pin As	Diameter is 59.850 ± 0.025 mm (2.3563 ± 0.0010 inch).
7	1	093-0086 Shim	As required, use the shim of thickness 1.0 mm (0.04 inch) to adjust maximum lateral clearance of 1.0 mm (0.04 inch).
8	As required, use the following shims to adjust a maximum lateral clearance of 1.0 mm (0.04 inch):
	1	133-2717 Shim	Thickness is 0.5 mm (0.02 inch).
	1	093-0097 Shim	Thickness is 2.0 mm (0.08 inch).
9	1	173-1342 Pin	Diameter is 69.950 ± 0.025 mm (2.7539 ± 0.0010 inch).
10	As required, use the following shims to adjust a maximum lateral clearance of 1.0 mm (0.04 inch):
	1	093-0086 Shim	Thickness is 1.0 mm (0.04 inch).
	1	7Y-2496 Shim	Thickness is 1.6 mm (0.06 inch).
11	As required, use the following shims to adjust a maximum lateral clearance of 1.0 mm (0.04 inch):
	1	093-0065 Shim	Thickness is 1.0 mm (0.04 inch).
	1	099-7091 Shim	Thickness is 1.5 mm (0.06 inch).
12	2	258-8502 Bushing	Bore of the bushing before assembly is 70.27 ± 0.04 mm (2.767 ± 0.002 inch).
12	2	258-8502 Bushing	Installation depth is 7.5 ± 0.5 mm (0.30 ± 0.02 inch).
13	1	7Y-2496 Shim	As required, use the shim of thickness 1.6 mm (0.06 inch) to adjust maximum lateral clearance of 1.0 mm (0.04 inch).
14	1	093-0118 Shim	As required, use the shim of thickness 2.0 mm (0.08 inch) to adjust maximum lateral clearance of 1.0 mm (0.04 inch).
15	2	093-1434 Lip Type Seal	Before assembly, lightly lubricate the sealing lip with the black 5P-0960 Grease Cartridge .